    <div class="register-input">
        <p>用户名: </p>
        <input id="username" type="text" placeholder="请输入用户名" style="width:250px">
        <br>
        <p>密码: </p>
        <input id="password" type="password" placeholder="请输入密码" style="width:250px">
        <br>
        <p>昵称: </p>
        <input id="nickname" type="text" placeholder="请输入昵称" style="width:250px">
        <button class="register-btn" (click)="UserRegister()">注册</button>
    </div>